The Regulation of the Function of Fibroblasts in Patients with Chronic Obstructive Pulmonary Disease by Regulating Tenascin-C Protein Under Feedback Lung Training with Curcumin in Combination with Suzi Jiangqi Decoction

Abstract

Chronic obstructive pulmonary disease (COPD) is characterized by reduction of elastic fibers in alveolar wall. This study explores the mechanism of curcumin combined with Suzi Jiangqi Decoction in lung fibroblasts. 50 COPD patients suspected of lung cancer were collected. Ten patients were assigned into control group, and the remaining 40 patients underwent feedback lung training and were divided into model group, curcumin group, Suzi Jiangqi decoction group, and curcumin combined with Suzi Jiangqi decoction group. 5 mL peripheral venous blood was collected and a percutaneous lung biopsy was performed to collect lung tissue and culture fibroblasts. Tenascin (TNC) level was detected by ELISA and pathological changes of lung tissue were detected by HE staining. CCK-8 assay detected cell proliferation and Transwell chamber detected cell migration. Cell apoptosis was assessed by flow cytometry and TGF-β1, MMP-9, and TNC expression were evaluated by Real Time Quantitative Polymerase Chain Reaction (RT-qPCR) and Western blot. TNC level in COPD patients decreased significantly and levels of various pulmonary function indexes showed an upward trend. The epithelial cells in lung tissue of control group were less and alveolar wall was obviously thinner. Epithelial cells gradually increased and alveolar walls gradually fused. TNC protein can improve the development of fibroblasts in COPD patients. Curcumin combined with Suzi Jiangqi Decoction inhibited TNC expression, and down-regulated TGF-β1 and MMP-9. Curcumin combined with Suzi Jiangqi decoction increased the proliferation ability and reduced apoptosis of lung fibroblasts by down-regulating the expression of Tenascin-C. This study provides a solid theoretical basis for curcumin combined with Suzi Jiangqi Decoction as a treatment for COPD.